Experimental study of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Ar</mml:mi><mml:mprescripts /><mml:none /><mml:mn>38</mml:mn></mml:mmultiscripts><mml:mo>+</mml:mo><mml:mi>α</mml:mi></mml:mrow></mml:math>
 reaction cross sections relevant to the 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ca</mml:mi><mml:mprescripts /><mml:none /><mml:mn>41</mml:mn></mml:mmultiscripts></mml:math>
 abundance in the solar system

Talwar, R.; Bojazi, M. J.; Mohr, P.; Auranen, K.; Avila, M. L.; Ayangeakaa, A. D.; Harker, J.; Hoffman, C. R.; Jiang, C. L.; Kuvin, S. A.; Meyer, B. S.; Rehm, K.E.; Santiago-Gonzalez, D.; Sethi, J.; Ugalde, C.; Winkelbauer, J.

doi:10.1103/physrevc.97.055801

Cited by 15 publications

(10 citation statements)

References 40 publications

(138 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Of course, such a statistical model approach can only be valid on average, and individual resonances in the 13 C(α,n) 16 O reaction may show a completely different decay branching. But it has been shown recently that a careful selection of TALYS parameters allows to reproduce (α,n) cross sections for intermediate [20,21] and even light nuclei [22], at least at energies E α above a few MeV. The calculated branching ratios b j as a function of energy E α are shown in Fig.…”

Section: Re-analysis Of the Har05 Datamentioning

confidence: 99%

Revised cross section of the C13(α, n)O16 react

Mohr

2018

Phys. Rev. C

View full text Add to dashboard Cite

As suggested in a Comment by Peters, Phys. Rev. C 96, 029801 (2017), a correction is applied to the 13 C(α,n) 16 O data of Harissopulos et al., Phys. Rev. C 72, 062801(R) (2005). The correction refers to the energy-dependent efficiency of the neutron detector and appears only above the (α,n1) threshold of the 13 C(α,n) 16 O reaction at about Eα ≈ 5 MeV. The corrected data are lower than the original data by almost a factor of two. The correction method is verified using recent neutron spectroscopy data and data from the reverse 16 O(n,α) 13 C reaction.

show abstract

Section: Re-analysis Of the Har05 Datamentioning

confidence: 99%

Revised cross section of the C13(α, n)O16 react

Mohr

2018

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…For this purpose the TALYS code (version 1.9) [54] was used which is a well-established open-source code for SM calculations. Similar to previous studies (see [55] for 64 Zn + α, [56,57] for 38 Ar + α and [23] for 115 In + α), the complete TALYS parameter space was investigated, and a χ 2 -based assessment was used to find the best description of the experimental data. In practice, 14 different A-OMPs were used which turn out to be the most important ingredient of the SM calculation.…”

Section: χ 2 -Based Assessmentmentioning

confidence: 99%

Cross section of α -induced reactions on Au197 at sub-Coulomb energies

et al. 2019

Self Cite

View full text Add to dashboard Cite

Background: Statistical model calculations have to be used for the determination of reaction rates in large-scale reaction networks for heavy-element nucleosynthesis. A basic ingredient of such a calculation is the α-nucleus optical model potential. Several different parameter sets are available in literature, but their predictions of α-induced reaction rates vary widely, sometimes even exceeding one order of magnitude.Purpose: This paper presents the result of α-induced reaction cross-section measurements on gold which could be carried out for the first time very close to the astrophysically relevant energy region. The new experimental data are used to test statistical model predictions and to constrain the α-nucleus optical model potential.Method: For the measurements the activation technique was used. The cross section of the (α,n) and (α,2n) reactions was determined from γ-ray counting, while that of the radiative capture was determined via X-ray counting. Results:The cross section of the reactions was measured below Eα = 20.0 MeV. In the case of the 197 Au(α,2n) 199 Tl reaction down to 17.5 MeV with 0.5-MeV steps, reaching closer to the reaction threshold than ever before. The cross section of 197 Au(α,n) 200 Tl and 197 Au(α,γ) 201 Tl was measured down to Eα = 13.6 and 14.0 MeV, respectively, with 0.5-MeV steps above the (α,2n) reaction threshold and with 1.0-MeV steps below that. Conclusions:The new dataset is in agreement with the available values from the literature, but is more precise and extends towards lower energies. Two orders of magnitude lower cross sections were successfully measured than in previous experiments which used γ-ray counting only, thus providing experimental data at lower energies than ever before. The new precision dataset allows us to find the best-fit α-nucleus optical model potential and to predict cross sections in the Gamow window with smaller uncertainties.

show abstract

“…There have been a few experimental studies using 17 F beams [20][21][22]. One such study measured the fusion cross section for a 208 Pb target where it was concluded that at energies around the Coulomb barrier no enhancement of the fusion cross section is observed [9], in contrast with the results for the 8 B + 58 Ni system [17] but consistent with those for 8 B + 28 Si [18]. It has been suggested that this lack of an enhancement in the fusion cross section could be due to an effective polarization of the 17 F in the strong Coulomb field of the 208 Pb target, leading to a shielding effect on the halo proton [23].…”

Section: Introductionmentioning

confidence: 82%

“…Details of the Encore detector will be published in a separate paper [26]. This detector system and analysis procedure has been successfully used at ANL for measurements of fusion reactions with carbon isotopes [3] as well as for measurements of (α,p) and (α,n) reactions [27,28].…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Experimental study of the $^{17}$F+ $^{12}$C fusion reaction and its implications for fusion of proton-halo systems

Asher,

Almaraz-Calderon,

Tripathi

et al. 2020

Preprint

View full text Add to dashboard Cite

The halo nature of the low-lying 1/2 + first excited state of the exotic weakly-bound proton dripline nucleus 17 F has long been hypothesized. The structure of such a halo nucleus would imply special nuclear properties including, possibly, an enhancement in its fusion cross section above the barrier. The total fusion cross section of 17 F + 12 C near the Coulomb barrier was studied using the newly developed 'Encore' active-target detector at Florida State University. Total fusion cross sections for the stable counterpart systems 16 O + 12 C and 19 F + 12 C were also measured to enable a systematic comparison. No influence of the halo nature of the 17 F 1/2 + first excited state on its fusion excitation function was observed when compared with the stable counterpart systems.

show abstract

Experimental study of Ar38+α reaction cross sections relevant to the Ca41 abundance in the solar system

Cited by 15 publications

References 40 publications

Revised cross section of the C13(α, n)O16 react

Revised cross section of the C13(α, n)O16 react

Cross section of α -induced reactions on Au197 at sub-Coulomb energies

Experimental study of the $^{17}$F+ $^{12}$C fusion reaction and its implications for fusion of proton-halo systems

Contact Info

Product

Resources

About